group by 查找订单的最新状态 join

标签：group by   join   left join   自join   

select c.*,tmp.type from complaints as c right join (
SELECT a.id, a.sn, a.created_at,a.type FROM (SELECT sn, max(created_at) created_at FROM procedures GROUP BY sn ) b JOIN procedures a ON a.sn = b.sn AND a.created_at = b.created_at where a.type=11
) as tmp on tmp.sn=c.sn

group by 查找订单的最新状态 join

标签：group by   join   left join   自join   

原文地址：http://blog.51cto.com/fulin0532/2122936